As been already 2 years since I wrote about useful software in the iPhone for studying Japanese language. In that post I shown you a Japanese language dictionary and a tool for studying kanji symbols.Recently I re-installed a software called katsuyo. Katsuyo is a very useful tool to conjugate Japanese verbs. It comes with a very neat and easy to use user interface and I am sure will be useful to all of you who is studying Japanese or to people that (like me) do not remember sometimes how to conjugate a given verb. The software also comes with a search function and other smaller interesting functions.To conclude, I inform you that the software is free (at the time when I installed the first time it was not and I am not sure it will be free for long) so that you do not have any reason not to try it. I hope it will be useful to some of you...